NEW HYDROXYCHALCONE DERIVATIVE

摘要

PURPOSE:To obtain the subject new compound useful as a therapeutic and a preventing agents for autoimmune diseases and inflammatory diseases such as chronic rhemarthritis. CONSTITUTION:A compound expressed by the formula. This compound expressed by the formula is obtained by extracting the bark of Pongamia pinnata which is a leguminous plant with an organic solvent such as methanol at a temperature of ambient temperature to the boiling point of the solvent for 3-5hr, distilling away the solvent, providing an extract essence, then partitioning the essence with water and an organic solvent such as ethyl acetate and purifying the essence in a portion passed into an organic layer by chromatography, etc.